(str nil)
=> ""
(type nil)
=> nil
(str (type nil))
=> ""
Rather than use `str`, try using `pr-str` to get a more accurate
representation of the data:
(pr-str nil)
=> "nil"
- James
On 25 April 2015 at 03:23, 임정택 <[email protected]> wrote:
> Hello, Clojure users.
>
> I'm a beginner of Clojure, so it could be a dumb question.
>
>
> I'm playing with Apache Storm, and I leave below line to see tuple value when
> something is wrong.
>
>
> (log-warn "Can't transfer tuple - task value is null. tuple type: " (type
> tuple) " and information: " tuple)
>
>
> log-warn is defined...
>
>
> (ns backtype.storm.log
>
> (:require [clojure.tools [logging :as log]]))
>
>
> (defmacro log-warn
> [& args]
> `(log/warn (str ~@args)))
>
>
> But it prints like...
>
>
> 2015-04-23T14:46:59.517+0200 b.s.d.worker [WARN] Can't transfer tuple - task
> value is null. tuple type: and information:
>
>
> Evaluated value of (type tuple) and tuple value (maybe toString()?) doesn't
> printed.
>
> Is this possible? If possible, please let me know what type the tuple can be.
>
>
> Thanks!
>
>
> Regards.
>
> Jungtaek Lim (HeartSaVioR)
>
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